An error has occured : java.lang.ArrayIndexOutOfBoundsException: Index -5 out of bounds for length 320 Mo There's something weird, and it don't look good... Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 PlantUML (1.2025.3beta6) has crashed. T2 with a very long name This version of PlantUML is 121 days old, so you should T3 Aliceconsider upgrading from https://plantuml.com/download Diagram size: 16 lines / 363 characters. 100 100 100 100 100 100 100 Bob Java Runtime: OpenJDK Runtime Environment JVM: OpenJDK 64-Bit Server VM Default Encoding: UTF-8 Language: en Country: US PLANTUML_LIMIT_SIZE: 4096 You should send this diagram and this image to plantuml@gmail.com or post to https://plantuml.com/qa to solve this issue. You can try to turn around this issue by simplifing your diagram. java.lang.ArrayIndexOutOfBoundsException: Index -5 out of bounds for length 320 net.sourceforge.plantuml.asciiart.BasicCharAreaImpl.drawChar(BasicCharAreaImpl.java:74) net.sourceforge.plantuml.asciiart.BasicCharAreaImpl.drawStringLR(BasicCharAreaImpl.java:126) net.sourceforge.plantuml.klimt.drawing.txt.UGraphicTxt.draw(UGraphicTxt.java:91) net.sourceforge.plantuml.klimt.drawing.AbstractUGraphicHorizontalLine.draw(AbstractUGraphicHorizontalLine.java:77) net.sourceforge.plantuml.klimt.creole.legacy.AtomText.drawU(AtomText.java:161) net.sourceforge.plantuml.klimt.creole.SheetBlock1.drawU(SheetBlock1.java:205) net.sourceforge.plantuml.klimt.creole.SheetBlock2.drawU(SheetBlock2.java:104) net.sourceforge.plantuml.project.draw.ResourceDrawNumbers.drawU(ResourceDrawNumbers.java:98) net.sourceforge.plantuml.project.GanttDiagram.drawResources(GanttDiagram.java:403) net.sourceforge.plantuml.project.GanttDiagram.access$700(GanttDiagram.java:121) net.sourceforge.plantuml.project.GanttDiagram$1.drawU(GanttDiagram.java:266) net.atmp.ImageBuilder.writeImageInternal(ImageBuilder.java:274) net.atmp.ImageBuilder.write(ImageBuilder.java:238) net.sourceforge.plantuml.project.GanttDiagram.exportDiagramNow(GanttDiagram.java:184) net.sourceforge.plantuml.AbstractPSystem.exportDiagram(AbstractPSystem.java:217) net.sourceforge.plantuml.servlet.DiagramResponse.sendDiagram(DiagramResponse.java:145) net.sourceforge.plantuml.servlet.UmlDiagramService.doGet(UmlDiagramService.java:106) javax.servlet.http.HttpServlet.service(HttpServlet.java:529) javax.servlet.http.HttpServlet.service(HttpServlet.java:623) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:199) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:168) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) org.apache.catalina.valves.StuckThreadDetectionValve.invoke(StuckThreadDetectionValve.java:185) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:383) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:937) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190) org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) java.base/java.lang.Thread.run(Thread.java:829) Diagram source: (Use http://zxing.org/w/decode.jspx to decode the qrcode)